Union Pacific has (or has had) a lot of C44-9Ws in long term storage around the system. UP definitely prefers AC powered units to DC powered units, so they have contracted with Wabtec to rebuild a lot of the older DC units into AC units. UP 9823 is a great example! It was originally CNW 8719, delivered in May 1994. It has now been rebuilt into a C44ACM.
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